From d5be48e9b89c9da7174b34ea32c591f1d1c51c19 Mon Sep 17 00:00:00 2001
From: Kirill Lakhov <kirill.9992@gmail.com>
Date: Wed, 12 Feb 2025 14:03:51 +0300
Subject: [PATCH] changed frame index computation

---
 cvat-core/src/frames.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/cvat-core/src/frames.ts b/cvat-core/src/frames.ts
index 19c3f88df884..0018772140fe 100644
--- a/cvat-core/src/frames.ts
+++ b/cvat-core/src/frames.ts
@@ -898,7 +898,9 @@ export async function getFrame(
     await refreshJobCacheIfOutdated(jobID);
 
     const framesMetaData = await frameDataCache[jobID].getMeta();
-    const frameMeta = framesMetaData.frames[frame - jobStartFrame];
+    const dataFrameNumber = framesMetaData.getDataFrameNumber(frame - jobStartFrame);
+    const frameIndex = framesMetaData.getFrameIndex(dataFrameNumber);
+    const frameMeta = framesMetaData.frames[frameIndex];
     frameDataCache[jobID].provider.setRenderSize(frameMeta.width, frameMeta.height);
     frameDataCache[jobID].decodeForward = isPlaying;
     frameDataCache[jobID].forwardStep = step;